can't find "File Requests API"

Yes, the existing API allows me to create, share and upload to folders. However, my understanding is that the shared folder would allow anyone with a link to view all the documents in the folder (which would violate numerous privacy laws o behalf of the applicant).

I need to use the API to create a folder, upload a document, then generate a link that allows  reference writers to upload a reference letter without being able to read the other letters of reference or the application form, and also allow the applicant to upload an essay and official transcripts without being able to read any of the (strictly confidential) letters of reference.  

As far as I know, the existing API does not provide a way to accomplish what I need. If I've overlooked that ability, please point me in the right direction. Thanks!